<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--  卡片视图 -->
    <el-card>
      <el-row><el-button type="primary" @click="AddRoleDialogVisible = true">添加角色</el-button></el-row>
      <!-- 角色列表 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级和三级 -->
              <el-col :span="19">
                <!-- 通过for循环 渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
         <template slot-scope="scope">
           <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
           <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
           <el-button
             type="warning"
             icon="el-icon-setting"
             size="mini"
             @click="showSetRightDialog(scope.row)"
           >分配权限</el-button>
         </template>
        </el-table-column>
      </el-table>
    </el-card>

 <!-- 分配权限 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <el-tree
        :data="rightsList"
        :props="treeProps"
        ref="treeRef"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加角色对话框 -->
    <el-dialog title="添加角色" :visible.sync="AddRoleDialogVisible" width="40%" @close="addRoleDialogClosed">
      <el-form
        :model="addRoleForm"
        ref="addRoleFormRef"
        :rules="addRoleFormRules"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="AddRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑角色对话框 -->
    <el-dialog title="编辑角色" :visible.sync="editRoleDialogVisible" width="40%" @close="addRoleDialogClosed">
      <el-form
        :model="editRoleForm"
        ref="editRoleFormRef"
        :rules="editRoleFormRules"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoles">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  data() {
    return {
      rolesList: [],
    // 分配权限框
      setRightDialogVisible: false,
      // 权限列表
      rightsList: [],
      //  树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //   默认选中节点ID值
      defKeys: [],
      //   添加用户对话框
      AddRoleDialogVisible: false,
      // 添加角色表单
      addRoleForm: {},
      //   添加角色表单验证
      addRoleFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      //   编辑角色信息
      editRoleForm: {},
      editRoleDialogVisible: false,
      editRoleFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      //   当前即将分配权限的Id
      roleId: 0
    }
  },
  created() {
    this.getRolesList();
  },
  methods: {
    async getRolesList () {
        const { data: res } = await this.$http.get('roles')
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败！')
        }
        this.rolesList = res.data
      },
      // 根据ID删除对应的权限
      async removeRightById (role, rightId) {
        // 弹框提示 删除
        const confirmResult = await this.$confirm(
          '此操作将永久删除该权限, 是否继续?',
          '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).catch(err => err)
        // 点击确定 返回值为：confirm
        // 点击取消 返回值为： cancel
        if (confirmResult !== 'confirm') {
          this.$message.info('已取消权限删除')
        }
        const { data: res } = await this.$http.delete(
          `roles/${role.id}/rights/${rightId}`
        )
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败！')
        }
        this.rolesList = res.data
        //   不建议使用
        this.getRolesList()
      },
      // 分配权限
      async showSetRightDialog (role) {
        this.roleId = role.id
        // 获取角色的所有权限
        const { data: res } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) {
          return this.$message.error('获取权限数据失败！')
        }
        //   获取权限树
        this.rightsList = res.data
        //   console.log(res)
        //   递归获取三级节点的id
        this.getLeafkeys(role, this.defKeys)
    
        this.setRightDialogVisible = true
      },
      // 通过递归 获取角色下三级权限的 id, 并保存到defKeys数组
      getLeafkeys (node, arr) {
        // 没有children属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }
        node.children.forEach(item => this.getLeafkeys(item, arr))
      },
      // 权限对话框关闭事件
      setRightDialogClosed () {
        this.rightsList = []
      },
      // 添加角色对话框的关闭
      addRoleDialogClosed () {
        this.$refs.addRoleFormRef.resetFields()
      },
      // 添加角色
      addRoles () {
        this.$refs.addRoleFormRef.validate(async valid => {
          if (!valid) return
          const { data: res } = await this.$http.post('roles', this.addRoleForm)
          if (res.meta.status !== 201) {
            this.$message.error('添加角色失败！')
          }
          this.$message.success('添加角色成功！')
          this.AddRoleDialogVisible = false
          this.getRolesList()
        })
      },
      // 删除角色
      async removeRoleById (id) {
        const confirmResult = await this.$confirm(
          '此操作将永久删除该角色, 是否继续?',
          '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).catch(err => err)
        if (confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        const { data: res } = await this.$http.delete('roles/' + id)
        if (res.meta.status !== 200) return this.$message.error('删除角色失败！')
        this.$message.success('删除用户成功！')
        this.getRolesList()
      },
      // 编辑角色
      async showEditDialog (id) {
        const { data: res } = await this.$http.get('roles/' + id)
        if (res.meta.status !== 200) return this.$message.error('查询角色信息失败！')
        this.editRoleForm = res.data
        this.editRoleDialogVisible = true
      },
      editRoles () {
        this.$refs.editRoleFormRef.validate(async valid => {
          // console.log(valid)
          // 表单预校验失败
          if (!valid) return
          const { data: res } = await this.$http.put(
            'roles/' + this.editRoleForm.roleId,
            {
              roleName: this.editRoleForm.roleName,
              roleDesc: this.editRoleForm.roleDesc
            }
          )
          if (res.meta.status !== 200) {
            this.$message.error('更新角色信息失败！')
          }
          // 隐藏编辑角色对话框
          this.editRoleDialogVisible = false
          this.$message.success('更新角色信息成功！')
          this.getRolesList()
        })
      },
      // 分配权限
      async allotRights (roleId) {
        // 获得当前选中和半选中的Id
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        // join() 方法用于把数组中的所有元素放入一个字符串
        const idStr = keys.join(',')
        const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
        if (res.meta.status !== 200) { return this.$message.error('分配权限失败！') }
        this.$message.success('分配权限成功!')
        this.getRolesList()
        this.setRightDialogVisible = false
      }
    }
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
